US trademark law is all about consumer confusion. If the other brewery is still functioning and some of your consumers believe there is a relationship between you and the other brewery, that confusion could restrict your ability to register your trademark. Even if you registered the trademark, the courts may still view you as the junior user (second user) in some geographies within the US and prevent you from enforcing your trademark against this other brewery (who would be the senior user). It is also possible the other brewery could revive their abandoned registration. Without having all the facts at hand (and analysis of those facts would take more time than should be expected for free information) it is hard to suggest how to proceed.
Answered on Jan 21st, 2014 at 9:23 AM